Simplified method of producing biodegradable aliphatic polyesters

US6562939B1 · kind B1 · utility

Assignee

• Ministero dell 'Universita'e della Ricerca Scientifica e Technologica · IT

Inventors

• Fernanda Farachi · Campi Salentina, IT
• Marco Foa · Novara, IT
• Tiziana Milizia · Novara, IT

Key dates

• Filing date: Dec 4, 2001
• Grant date: May 13, 2003
• Expiry date: Dec 4, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G63/78
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method of synthesizing biodegradable aliphatic polyesters from one or more aliphatic dicarboxylic acids or diesters of the said acids and one or more linear or branched aliphatic glycols, comprising a first esterification or transesterification step and a second deglycolation under vacuum step, in which the catalyst is monobutylstannoic acid both for the esterification or transesterification step and for the deglycolation under vacuum step.